28610917 has 2 divisors, whose sum is σ = 28610918. Its totient is φ = 28610916.

The previous prime is 28610893. The next prime is 28610951. The reversal of 28610917 is 71901682.

It is a happy number.

It is an a-pointer prime, because the next prime (28610951) can be obtained adding 28610917 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17859076 + 10751841 = 4226^2 + 3279^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28610917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28610957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14305458 + 14305459.

It is an arithmetic number, because the mean of its divisors is an integer number (14305459).

Almost surely, 2^28610917 is an apocalyptic number.

It is an amenable number.

28610917 is a deficient number, since it is larger than the sum of its proper divisors (1).

28610917 is an equidigital number, since it uses as much as digits as its factorization.

28610917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 28610917 is about 5348.9173670940. The cubic root of 28610917 is about 305.8514843117.

The spelling of 28610917 in words is "twenty-eight million, six hundred ten thousand, nine hundred seventeen".